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Inheritance of Resistance to Pea Seed‐borne Mosaic Virus in Lentils 1
Author(s) -
Haddad N. I.,
Muehlbauer, F. J.,
Hampton R. O.
Publication year - 1978
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1978.0011183x001800040022x
Subject(s) - biology , inoculation , potyvirus , cultivar , virus , plant disease resistance , plant virus , mosaic virus , horticulture , gene , incubation period , virology , botany , incubation , genetics , biochemistry
The USDA collection of lentils ( Lens culinaris Medic .) was screened for resistance to pea seed‐borne mosaic virus (PSbMV); PI lines 212610, 251786, 297745, and 368648 were found to be immune. After inoculation and an incubation period the virus was not recoverable by local lesion assay from the resistant lines, nor did the resistant lines develop symptoms or transmit the virus through seeds from inoculated plants. Two immune lines were used to study the inheritance of resistance. The F 2 progenies of crosses between PI 368648 and the susceptible cultivars ‘Tekoa’ and ‘Precoz’ segregated in a 3:1 ratio of susceptible to resistant plants, indicating that resistance was conferred by a single recessive gene. All F 2 progenies of a cross between PI 368648 and PI 212610 were 100% resistant, which indicated that the same recessive gene was present in the two sources. We propose that the gene symbol sbv be used to designate resistance to PSbMV in lentils. The PSbMV‐infected plants could be identified under a range of temperatures. However, symptom expression was more severe at 24 and 30 C than at 18 C. Symptoms at all temperatures included stunting, leaf curling, and leaf size reduction. Vein clearing, tip bending, and tip necrosis occurred at 24 and 30 C, whereas, premature plant death only occurred at 30 C.